SIL CanGuard SI65GD18 O-Ring, Size: -004
Material: SIL CanGuard SI65GD18 O-Ring
Size: AS568 -004 O-Ring
Part Number: SI65GD18-OR-004
CanGuard™ (Canyon Components)
SI65GD18
Silicone (VMQ)
65
Shore A
EMI Nickel and Carbon Filled
Color: Dark Gray
Detailed Description
SI65GD18-OR-004 is a Dark Gray, 65 Shore A, Silicone (VMQ) O-Ring made from CanGuard™ (Canyon Components). It is a 75 durometer Silicone (VMQ). CanGuard™ (Canyon Components) SI65GD18 is manufactured with the following features & specifications: EMI Nickel and Carbon Filled. SI65GD18-OR-004 is AS568 size -004 O-Ring also referred to as 1.78mm (Cross Sectional Diameter (CS)) x 1.78mm (Inside Diameter (ID)).
Material: 65 Durometer SIL CanGuard SI65GD18 O-Ring
Size: AS568 -004, 1.78mm CS X 1.78mm ID (0.070" CS X 0.070" ID)
| Technical Specification | Value |
|---|---|
| Compound Number | SI65GD18 |
| Brand | CanGuard™ (Canyon Components) |
| Material | Silicone (VMQ) |
| Color | Dark Gray |
| Durometer | 65 Shore A Hardness |
| High Temperature | 150 °C / 302 °F |
| Low Temperature | -55 °C / -67 °F |
| Geometry Specifications | |
| Cross Sectional Geometry | O-Ring |
| Size Standard | AS568 |
| Size | -004 |
| Cross Section (CS) | 1.78 mm / 0.070 in |
| Inside Diameter (ID) | 1.78 mm / 0.070 in |
| Other Specifications | |
EMI Nickel and Carbon Filled | |
SI65GD18 is a 65 shore A dark gray conductive silicone compound from CanGuard that incorporates nickel-plated graphite for high performance EMI and RFI shielding. This material delivers excellent electrical conductivity with shielding effectiveness up to 100 dB at 10 GHz, making it ideal for O-rings and gaskets used in electronic enclosures, aerospace systems, and military applications. It maintains flexibility and sealing integrity across a service temperature range of -55°C to 150°C, while offering a balance of durability and cost effectiveness. SI65GD18 is well suited for applications where both environmental sealing and electromagnetic protection are required, though its abrasion resistance is lower than standard elastomers.
Conductive silicone (VMQ) materials are specialized elastomers designed to provide both sealing and electrical performance in O-rings and gaskets. By incorporating conductive fillers such as nickel-plated graphite, these materials enable effective EMI and RFI shielding while retaining the flexibility and temperature resistance of silicone rubber. They are commonly used in aerospace, telecommunications, and electronics industries where protection against electromagnetic interference and electrostatic discharge is critical. Compared to standard silicone, conductive grades prioritize electrical properties over mechanical wear resistance, making them best suited for static sealing applications.
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